Point-to-Point Protocol

Jun 25,2009 by alperen

Know the commands and syntax used to configure PPP
connections between the central site and branch offices.

Understand the commands and syntax to configure PAP or
CHAP authentication.

Know how to configure multilink services.

Be able to verify and troubleshoot PPP configurations.

Know the commands and procedures to configure a PC for
dial-up connections.

The Point-to-Point Protocol (PPP) is one of the serial encapsulations
that administrators find useful for remote access solutions.
PPP operates over a wide range of media and was designed
to simplify the transport of multiple protocols (IP, IPX, AppleTalk, and so on) over serial
links. Though the protocol does operate over other media, this chapter focuses solely on
remote access solutions.
With the intense demand for connectivity by salespeople, remote staff, and telecommuters, it
becomes clear that consistent remote access solutions are required. The benefits of using PPP are
that it is universal and efficient. PPP on Windows should be able to communicate with PPP on any
access server, and the configuration demands on the client side are extremely small, thus resulting
in fewer support issues. Although HDLC, SLIP, and Frame Relay encapsulations are also somewhat
standardized, the benefits of PPP and its low overhead, along with virtually universal media
support, make it an excellent choice for remote access.
This chapter provides an overview of PPP and the commands and processes required to configure
this protocol on Cisco access servers.